Steel heating boiler



s 1925. 1,564,475 F. J. FLAJOLE STEEL HEATING BOILER 3.

Filed Oct. 24, 1922 INVENTOR if 3 /96mg; J/Vq/o/e ATTORNEY Y Y PatentedDec. 8, 1925.

- UNITED STATES BEST. AVAiLABLt'E COPY FRANK J. FIiAJOLE, or SEATTLE,WASHINGTON.

srnnnnnnzrmdno nnna Application filed October 24,1922. Serial No.596,575.

To all whom it may concern: L

. Be it known that I, FRANK J. FLAaoLE, a

. citizen of the United States, residing at Seattle, county of King, andState of Wash-i .ington, have invented a new and useful Steel HeatingBoiler; and I do hereby declare that -.the following is a full, clear,and exact specification, such as will enable' others skilled in the artto which it appertains to make and use the same.

The invention is a heating boiler which is constructed of steel anddesigned so that it will yield the highest possible efficiency.

The object of the invention is to construct a heating boiler in whichthe fire box and fiues are completely surrounded by water.

Another object of. thelinvention is to provide a heating boiler that ismade of steel in through the upper set to the flue.

which the horizontal division plate below the tubes is directlyconnected to the shell.

And a further object of the invention is to provide a steel heatingboiler in which the sediment will not be co lected on the plate whichforms the top of the fire box.

lVith these ends in view the invention embodies a steel shell in whichis an inner shell with an arched top, forming the fire box, and ahorizontal partition between the top of the fire box and the tubes whichis semicircular and whose ends, which extend upward, are welded to theouter shell. sides of the outer shell curve inward at the point midwaybetween the fire box and the tubes so that they will withstand a greaterpressure.

sets so that the gases will pass forward through the lower set and thenbackward The entire fire box is water jacketed and these jackets areopen to the steam chest above.

Other features and advantages of the invention will appear from thefollowing description taken in connection with the drawings, whereinFigure 1 is a part cross section on the line 11 of Figure 3.

Figure 2 is a cross section on the line 22 of Figure 3.

Figure 3 is a longitudinal section with parts of the exterior shown.

In the drawings I have shown my boiler as it would be constructedwherein numeral 1 indicates the plate which forms the sides and arch topof the fire box and this plate Both The tubes are installed above thehorlzontal partition and are arranged in two is split in the center fromthe point 2 to the rear end and bent upward to form the sides 3 and 4 asshown in Figure Another plate 5 is corrugated at the top and then bentdownward to meet the ends of the plates 3 and 4: and these ends arewelded to gether.. The lower ends of the plate 1 are bent outward asshown in Figures 1 and 2 so that the lower ends of the shell may bewelded to them. Another plate 6 may be connected to the plate 5 and tothe rear edges of the plate 1 and then extended downward to the bottomof the shell whereitis bent outward so that the shell may be welded toit in a similar manner asto the ends of the plate 1.. Anotherv tubeplate]? is.connected to the forward endof the plate5 andalsoto thetopofthe arch formed by 'the plate 1. Or one plate may be used to take theplace of the plates 5, 6 and 7,: These plates are the top, and down theother side so that its lower ends may be welded to the outstanding endsof the plates 1 and 6. Another plate 9 forming a horizontal partitionmay be bent in the shape of an arc and welded to the shell 8 at its.ends .10 and also through the rivet holes 11. This plate may haveopenings 12 in it so that water may pass through it from the chambersurrounding the fire box to the chamber surrounding the tubes and thisplate maybe attached to the top of the arch over the fire box by bolts13 or in any desired manner. Another. plate 14 may be connected to thefront end of the shell to form the front of the boiler and another plate15 may be connected to the rear end to Two sets of tubes 19 and 20 maybe placed 100 in the space above the fire box to carry the gases firstforward and then backward similar to any horizontal fire tube boiler andshort bolts 21 may be placed at spaced in tervals completely around thefire box to 1 hold the inner shell to the outer, and long bolts 22 maybe placed through the boiler as shown in Figures 1 and 3.

Any type of base may be used which may have a grate 23 below the firebox, a bafile be made in the construction withoutdeparb.

ing from the spirit of the invention; Oiie of which changes may beinthcnse of different radii for the curves of the shell or the fire box,another may be in the use of more or less tubes or in the change of thesize, and another may be in the type of connection-between the two sidesor between the partition and the top of the arch.

The construction will be readily understood from the foregoingdescription. To use the device it will be assembled asshown and as fireis started in the fire box the gases will pass upward and then forwardthrough the tubes 19 to the chamber 16 from where they will then passbacl-zward through the tubes 20 to the flue. It will be seen that theentire fire box will be surrounded with water, with the exception ot thebottom-and as the top is arched there will be no CG1- ners where airpockets may be formed. It will also be seen that the partition-9= notonly acts as a. support for the two sides-but will catch all sedimentfrom the uppzrsection of the boiler so that this sediinent'willf not bepermitted to drop on the-plate directly above the fire. box. As thewater is heated it will pass upward from the sectionsurrounding the firebox through the holes 12 in the partition 9 to the upper sectionsurrounding the tubes and from the top of this section it may be drawnoil through-any suitable connection 01' by only fillingthe boiler to apoint just above the top row of tubes the water may be convertedintostearn and the steam may be drawn off in any desired manner.

Having thus fully described the invention what I claim as new and desireto secure by Letters Patent, is

1. In a boiler having a tire box and'fire tubes above the fire box, anouter shell being formed of steel plate and being bent inward at a pointmidway between the fire box and the tube section, an inner plate forminga fire box with theupper part bent, to form the upper half of a circleand constructed so that a space will be left between it and the outershell, stay-boltsbtween this plate-and theouter shell, another platebent to form the lower half of a. circle abovethe fire box, said platehaving openings through itand havingits edges welded to the outer BESTAVAlLAElLE COPY shell, a connection between the bottom of this splateandwthe, top of? the-:plate; forming the fii'e -box', an openingin thetop-of the fire box at the rear of the boiler formed by splitting the.plate, forming the fire box a short distance from the rear end andbending theedges upward, a corrugated plate forming the top of thissection at the rear and being connected-etc the edges of the formerplate and to a tube plate at the front, another plate forming: the rearof'th'e the box being connected to the plate'formi-ng the the boxand'tothe corrugated plate and having a space between itand the outer shell,stay-bolts between this plate and the outrr-shelL-and a weldedconnection between the lower endsof all the plates forming theinnenshelr and the outer shell.

2: Irv-a boiler having a fire box vlith fire tubes above, an outersh'ellformed "of 'steelpl ate and curved inward at a point midway between-thefire box and"; the tube section,

an inner shell "which forms the firebox and the upper portionof whiclris-bent to-form theupper halfof a circle and-arranged with a spacebetween it andf the' outer shell, said inner and outer shell havingstay-bolts between them, another; plate bent/to form "the lower half-ofcircle *above the fire" box which has-openings-through it :and its edgesattached to the outer shell, said platebeing attached to the plateforming the top of the fire box at the center, said fire box having anopening at the rear which is formed. by splitting the plate. forming thefirebox a short distance from the rear andbending the edges upward,andsaid opening-being covered by. corrugated plate whichbis con-' nectedto th'eedges of the former plate, and said 7 inner and outer shellshaving their lower edges connected by welding.

3. A boiler of the class described having an inner shell forming a firebox, an outer shell, the walls of said inner and outer shells beinglield'together by stay-bolts, a circular tube section above said firebox, sections at opposite sides of'the outer shell' 'beingbent inwardlybetween the fire box section and the circular tube section, an opening'at the rear 'ofthe fire box, a false bottom under the circular tubesection, a corrugated cover for theopcning at the-rear of the firebox,the said sections of the outer shell that are bent inwardly beingrigidly held together by stay-bolts.

FRANK J. FLAJOLE;

